NF DP420LS User manual

PROGRAMMABLE AC POWER SOURCE
DP420LS/DP480LS
INSTRUCTION MANUAL
NF Corporation

PROGRAMMABLE AC POWER SOURCE
DP420LS/DP480LS
INSTRUCTION MANUAL
DA00056421-003

DP420LS/DP480LS i
 Preface 
Thank you for purchasing our Programmable AC Power Source DP420LS/DP480LS.
For safe and correct use of the electrical product, please first read "Safety Precautions" on the next
page.
Alert symbols in this manual
This manual uses the following alert symbols. The instructions by these alert symbols shall be
carefully obeyed to ensure equipment operator's safety and prevent damage to equipment.
Equipment handling could result in death or serious injury. This symbol contains information
to avoid such risk.
Equipment handling could result in minor or moderate injury, or property damage. This
symbol contains information to avoid such risk.
This manual consists of the following chapters.
If it is the first time for you to use this product, start with "1. Outline."
1. Outline: Explains the overview, configuration, and features of this product.
2. Preparation before Use: Explains the preparations carried out before installation or operation.
3. Basic operation: Explains the component names and basic operations.
4. Advanced Operation: Explains the operations more extensively.
5. Description of Screen and Menu: Explains the screen configuration and menu composition.
6. Remote Control: Explains the remote control via communication interface.
7. Options: Explains the available options.
8. Peripherals: Explains the equipment used with this product.
9. Troubleshooting: Explains the remedies when an error message is displayed, or when a failure
is suspected.
10. Maintenance: Explains the methods of storage, packaging, transportation and maintenance.
11. Specifications: Provides the list of specifications of functions and performance.
Scope of contents
In this manual DP420LS/DP480LS are covered.
The description of this manual applies to products with firmware version 1.60 and above.
For details on checking the firmware version, see Chapter 10.4.
CAUTION
WARNING

PROGRAMMABLE AC POWER SOURCE
ii
 Safety Precautions 
For safe use, ensure to obey the following warnings and considerations.
We are not responsible for damage resulting from failure to obey these warnings and considerations.
This product is an insulation Class I device (with a protective conductor terminal) complying with
the JIS and IEC standards.
Ensure you obey the instructions in this instruction manual.
This instruction manual contains instructions for safe operation and use of this product.
Before using this product, please read this manual first.
All the warning items contained in this instruction manual are intended for preventing risks that may
lead to serious accidents. Ensure to obey them.
Ensure to ground.
Ensure to connect the protective conductor terminal of the power input terminal of this product to an
earth ground so that ground resistance is 100 or less. If the product is not certainly grounded, an
electric shock might occur.
To prevent electric shock, ensure that the protective grounding conductor is connected before you
connect a cable to the power input terminals L1, L2 and L3.
For grounding, use a power cable of sufficient ampacity for the maximum input current (see Table
2-4).
Check the power supply voltage.
This product operates on the power supply voltage specified in "2.4 Grounding and Power
Connections". Before connecting this product to a power supply, make sure that the voltage of
distribution board conforms to the power supply voltage rating of the product.
If you notice anything strange
If this product produces smoke, unusual odor, or strange sound, immediately cut the power to the
product and stop using it.
Should you encounter any anomaly like above, immediately contact us or our agent. Never use it
until the repair is completed.
Do not use in a gaseous atmosphere.
This may pose a risk of explosion or other.
Do not remove the cover.
This product has high-voltage portions inside. Never remove the cover.
When inspection into the inside of the product is needed, never allow anybody to touch the innards
except our certified service engineers.

DP420LS/DP480LS iii
Do not modify the product.
Never modify the product. Modification to the product may pose a new risk. We may refuse the
repair of a modified product at fault.
Prevention of electric shock by output voltage
The maximum output of this product is 440 V. Be careful to avoid electric shock. Directly
touching the output or changing the cable connection while the output is on may cause electric
shock.
This product weights over 600 kg.
Do not carry it alone, or you may suffer physical injury.
Do not expose this product to water.
When this product is used in wet condition, it may cause an electric shock and a fire. If this product
is exposed to water, cut the power at the distribution board immediately, and contact NF Corporation
or one of our representatives.
If lightning occurs, power off this product and cut the power at the distribution board.
A lightning may cause an electric shock, a fire and a failure.
Safety symbols
The following shows the general definitions of the safety symbols used on the product main unit and
in the instruction manual.
Refer to the instruction manual
This notifies the user of potential hazards and indicates that he/she must refer to the
instruction manual.
Electric shock hazard
This indicates that an electric shock may occur under specific conditions.
Protection conductor terminal
This indicates that the terminal needs to be grounded in order to prevent electric shock
accidents.
Before operating the equipment, ensure to connect this terminal to an earth ground so
that ground resistance is 100 or less.
Warning
Equipment handling could result in death or serious injury. This symbol
contains information to avoid such risk.
Caution
Equipment handling could result in minor or moderate injury, or property
damage. This symbol contains information to avoid such risk.
CAUTION
WARNING

PROGRAMMABLE AC POWER SOURCE
iv
Other symbol
Chassis
This indicates that the terminal (or external conductor for a connector) is connected to
the chassis.
Request about disposal
For environmental preservation, this product shall be disposed of through an appropriate industrial
waste disposer.
This product does not include a battery.

DP420LS/DP480LS v
Table of Contents
Page
Preface ...................................................................................................................................... i
Safety Precautions.................................................................................................................... ii
List of Figures .......................................................................................................................... xi
List of Tables ..........................................................................................................................xiii
1. Outline................................................................................................................................. 1
1.1 Overview..................................................................................................................... 2
1.2 Features ..................................................................................................................... 2
2. Preparation before Use........................................................................................................ 5
2.1 Check before Use ....................................................................................................... 6
2.2 About Installation Environment ................................................................................... 7
2.3 Cautions during Moving and Transportation................................................................ 9
2.4 Grounding and Power Connections .......................................................................... 10
2.5 Output and System Cable Connection ...................................................................... 13
2.5.1 Single-phase Output .......................................................................................... 13
2.5.2 Polyphase System ............................................................................................. 14
2.6 Simple Operation Check ........................................................................................... 18
2.7 Calibration ................................................................................................................ 20
3. Basic Operation................................................................................................................. 21
3.1 Component Name..................................................................................................... 22
3.1.1 Front .................................................................................................................. 22
3.1.2 Rear................................................................................................................... 23
3.1.3 Control Panel..................................................................................................... 25
3.2 Power On/Off............................................................................................................ 26
3.2.1 Before Turning on the Power ............................................................................. 26
3.2.2 Power On........................................................................................................... 26
3.2.3 Screen Display and Operations at Starting Up................................................... 27
3.2.4 The Settings Loaded after Startup ..................................................................... 27
3.2.5 Checking the Rated Power ................................................................................ 28
3.2.6 Power Off .......................................................................................................... 28
3.3 Basic Key Operations ............................................................................................... 29
3.3.1 Changing the Output Function (Continuous/Sequence/Simulation) ................. 29
3.3.2 Item Selection.................................................................................................... 30
3.3.3 Using Soft-keys ................................................................................................. 31
3.3.4 Closing Windows ............................................................................................... 31
3.3.5 Entering Values (Numerical Entry Box).............................................................. 32
3.3.6 Entering Strings (Character String Entry Box).................................................... 33
3.3.7 Using Shortcut Operations (SHIFT Key) ............................................................ 34

PROGRAMMABLE AC POWER SOURCE
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3.4 Using the Continuous Function ................................................................................. 35
3.4.1 Setting the AC/DC Mode and the Signal Source................................................ 35
3.4.2 Setting the Output Range .................................................................................. 38
3.4.3 Setting Waveforms ............................................................................................ 39
3.4.4 Setting the Output Voltage (Single-phase Output) ............................................. 41
3.4.5 Setting the Output Voltage (Polyphase System) ................................................ 42
3.4.6 Setting the Output Frequency ............................................................................ 44
3.4.7 Setting the Output On/Off Phase ....................................................................... 44
3.4.8 Turning the Output On or Off ............................................................................. 45
3.4.9 Using the Measurement Function ...................................................................... 46
3.4.10 Switching the Display Format (RMS/AVG/Peak)of the Measured Value............. 47
3.4.11 Enlarge Display Letters for the Measured Value................................................ 49
3.4.12 Clearing the Output Current Peak-hold Value .................................................... 51
3.4.13 Switching the Target Phase of which the Measured Values are Displayed
(Polyphase System)........................................................................................... 53
4. Advanced Operation .......................................................................................................... 55
4.1 Using Limiter, Setting Limiter .................................................................................... 56
4.1.1 Use Peak Current Limiter .................................................................................. 56
4.1.2 Using RMS Current Limiter ................................................................................ 58
4.1.3 Using Voltage Setting Range Limit..................................................................... 60
4.1.4 Using Frequency Setting Range Limit................................................................ 62
4.1.5 About Wattage Limiter ....................................................................................... 63
4.2 Using Sequence Function......................................................................................... 63
4.2.1 Basics................................................................................................................ 63
4.2.2 Parameters of Sequence Function..................................................................... 66
4.2.3 Example of Output Using Sequence Function.................................................... 69
4.2.4 Process Flow in a Step ...................................................................................... 69
4.2.5 Edit a Sequence ................................................................................................ 71
4.2.6 Load a Sequence............................................................................................... 74
4.2.7 Execute a Sequence.......................................................................................... 78
4.2.8 Save a Sequence .............................................................................................. 82
4.2.9 Clear/Rename Sequence................................................................................... 86
4.2.10 Set so as the Sequence Function is Selected at Power-on................................ 90
4.2.11 Sequence Control by CONTROL I/O ................................................................. 91
4.2.12 Screen Overview ............................................................................................... 91
4.3 Using Power Fluctuation Testing (Simulation) Function ............................................ 93
4.3.1 Basics................................................................................................................ 93
4.3.2 Simulation Function Parameters........................................................................ 94
4.3.3 Output Examples Using Simulation Function ..................................................... 96
4.3.4 Process Flow in a Step ...................................................................................... 98
4.3.5 Editing Simulation.............................................................................................. 98
4.3.6 Loading a Simulation ....................................................................................... 101

DP420LS/DP480LS vii
4.3.7 Executing Simulation ....................................................................................... 104
4.3.8 Saving Simulation............................................................................................ 106
4.3.9 Clear/Rename Simulation ................................................................................ 110
4.3.10 Set so as the Simulation Function is Selected at Power-on ............................. 114
4.3.11 Simulation Control by CONTROL I/O............................................................... 115
4.3.12 Screen Overview ............................................................................................. 115
4.4 Measuring Harmonic Current .................................................................................. 117
4.4.1 Harmonic current ............................................................................................. 117
4.4.2 Basics.............................................................................................................. 118
4.4.3 Measured Value Display Method ..................................................................... 118
4.5 Measuring Inrush Current ....................................................................................... 119
4.5.1 Inrush Current.................................................................................................. 119
4.5.2 Basics.............................................................................................................. 120
4.5.3 Measurement Method ...................................................................................... 120
4.5.4 Measurement Tips ........................................................................................... 121
4.6 Using Clipped Sine Wave ....................................................................................... 121
4.7 Outputting Arbitrary Waveform................................................................................ 124
4.7.1 Basics.............................................................................................................. 124
4.7.2 Arbitrary Waveform Creation Procedure .......................................................... 125
4.7.3 Arbitrary Waveform Creation Example............................................................. 125
4.7.4 Transferring Arbitrary Waveform...................................................................... 125
4.7.5 Outputting Arbitrary Waveform ........................................................................ 128
4.8 Using Memory Function .......................................................................................... 129
4.8.1 Basic Setting Memory...................................................................................... 130
4.8.2 Arbitrary Waveform Memory ............................................................................ 137
4.8.3 Sequence Memory........................................................................................... 141
4.8.4 Simulation Memory .......................................................................................... 142
4.9 Using USB Memory Function.................................................................................. 143
4.10 Using Monitor Function ........................................................................................... 144
4.11 Using Remote Sensing Function............................................................................. 147
4.12 Using AGC Function ............................................................................................... 150
4.13 Using Autocal Function ........................................................................................... 153
4.14 Adjusting DC Offset ................................................................................................ 157
4.15 Using for Unbalanced Polyphase Output ................................................................ 159
4.16 Using as DC Power Supply..................................................................................... 161
4.17 Setting Voltage using External DC Input Signal ...................................................... 162
4.17.1 Using External Signal in AC-VCA Mode........................................................... 162
4.17.2 Using External Signal in DC-VCA Mode .......................................................... 164
4.18 Control Using External Control Function................................................................. 165
4.18.1 Using CONTROL I/O ....................................................................................... 166
4.18.2 Control of DIP or RIN....................................................................................... 171
4.19 Synchronizing the Output Frequency with the Power Line or the External Signal ... 172

PROGRAMMABLE AC POWER SOURCE
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4.20 Amplifying the External Signal Input ....................................................................... 174
4.21 Turning the Output On or Off Rapidly...................................................................... 175
4.22 Enabling Automatic Output-On at Power-On........................................................... 177
4.23 Power Unit Energization Setting (Using Under the Restricted Rated Power) .......... 179
4.24 Key Lock................................................................................................................. 181
4.25 Beep ....................................................................................................................... 181
4.26 Changing the Background Color and the Contrast of the Screen............................ 182
4.27 Restoring to the Factory Default Setting (Reset)..................................................... 184
5. Description of Screen and Menu...................................................................................... 187
5.1 Screen Configuration .............................................................................................. 188
5.1.1 Status Icon ...................................................................................................... 189
5.1.2 Measured Value Display Items ........................................................................ 190
5.1.3 Output Setting Display Items ........................................................................... 191
5.1.4 Warning and Error Display............................................................................... 191
5.2 Menu Composition .................................................................................................. 192
5.2.1 Menus of the Continuous Function .................................................................. 192
5.2.2 Menus of the Sequence Function .................................................................... 193
5.2.3 Menus of the Simulation Function.................................................................... 194
5.2.4 Menus of the Memory Function ....................................................................... 194
5.2.5 System Menus ................................................................................................. 195
6. Remote Control ............................................................................................................... 197
6.1 Communication Interface ........................................................................................ 198
6.1.1 USB ................................................................................................................. 198
6.1.2 RS232 ............................................................................................................. 200
6.1.3 GPIB................................................................................................................ 202
6.1.4 LAN ................................................................................................................. 204
6.2 Remote/Local State Switching ................................................................................ 206
6.2.1 Remote State................................................................................................... 206
6.2.2 Local State ...................................................................................................... 206
7. Options............................................................................................................................ 207
7.1 Remote Controller................................................................................................... 208
7.2 System Cable (for Polyphase System).................................................................... 208
7.3 Replacement Air Filter ............................................................................................ 209
7.4 Fixing Bracket......................................................................................................... 209
8. Peripherals ...................................................................................................................... 211
8.1 Peripherals Line-up................................................................................................. 212
8.1.1 Immunity Test Software（DP0408）................................................................ 212
8.1.2 Voltage Dips Simulator（DP4170 Series）...................................................... 212
8.1.3 Reference Impedance Network（DP4160 Series）......................................... 212
8.2 Using in combination with DIP or RIN ..................................................................... 213
8.2.1 The case the voltage drop due to wiring is small ............................................. 213
8.2.2 Compensating the voltage drop by the FEEDBACK connector of DIP or RIN .. 213

DP420LS/DP480LS ix
9. Troubleshooting............................................................................................................... 215
9.1 Error Messages and Error Handling........................................................................ 216
9.1.1 Error Message Screen..................................................................................... 216
9.1.2 If An Error Message is Displayed..................................................................... 216
9.1.3 If An Error Occurs Repeatedly ......................................................................... 217
9.1.4 Protection Operation Types ............................................................................. 218
9.1.5 Error Message List .......................................................................................... 219
9.2 When a Failure is Suspected .................................................................................. 223
10.Maintenance.................................................................................................................... 229
10.1 Preface ................................................................................................................... 230
10.2 Daily Maintenance .................................................................................................. 230
10.3 Storage, Repackaging, Transportation .................................................................... 232
10.4 Checking Firmware Version .................................................................................... 233
11. Specifications .................................................................................................................. 235
11.1 Output Function ...................................................................................................... 237
11.2 Output Range ......................................................................................................... 237
11.3 AC/DC Mode........................................................................................................... 237
11.4 Signal Source ......................................................................................................... 238
11.5 AC Output............................................................................................................... 239
11.6 DC Output............................................................................................................... 241
11.7 Output Voltage Stability........................................................................................... 241
11.8 Distortion of Output Voltage Waveform ................................................................... 242
11.9 Power Input ............................................................................................................ 242
11.10 Withstand Voltage and Insulation Resistance ......................................................... 242
11.11 Measurement Function ........................................................................................... 243
11.12 Power Unit Energization Setting ............................................................................. 245
11.13 Current Limiter........................................................................................................ 246
11.14 Setting Range Limit Function.................................................................................. 247
11.15 Remote Sensing ..................................................................................................... 248
11.16 AGC........................................................................................................................ 249
11.17 Autocal (Output Voltage Compensation) ................................................................. 249
11.18 Sequence ............................................................................................................... 250
11.19 Simulation............................................................................................................... 251
11.20 Clipped Sine Wave ................................................................................................. 252
11.21 Arbitrary Wave ........................................................................................................ 252
11.22 External Signal Input............................................................................................... 253
11.22.1 External Synchronous Signal Input (Signal Source SYNC only) ...................... 253
11.22.2 Voltage Setting Signal Input (Signal Source VCA only) ................................... 253
11.22.3 External Signal Input (only EXT and ADD)....................................................... 254
11.23 General Function .................................................................................................... 254
11.24 Memory Function .................................................................................................... 255
11.25 Self-diagnosis/Protection Function.......................................................................... 256

PROGRAMMABLE AC POWER SOURCE
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11.26 External Control Function ....................................................................................... 256
11.26.1 CONTROL I/O ................................................................................................. 257
11.26.2 Control of peripherals by device control........................................................... 258
11.27 External Interface ................................................................................................... 258
11.28 USB Memory Interface............................................................................................ 259
11.29 Waveform Monitor Output ....................................................................................... 259
11.30 Operation Environment ........................................................................................... 260
11.31 Externals, Weight, and Terminal Block.................................................................... 261
11.32 Option..................................................................................................................... 261
11.33 Outline Dimensional Drawing.................................................................................. 262
Index..................................................................................................................................... 266

DP420LS/DP480LS xi
Figures and Tables
List of Figures
Page
Figure 2-1 How to Use the Adjuster Foot .................................................................................. 7
Figure 2-2 Power input terminal .............................................................................................. 12
Figure 2-3 System Cable connection diagram ........................................................................ 14
Figure 3-1 Component Name (Front) ...................................................................................... 22
Figure 3-2 Component Name (Rear)....................................................................................... 23
Figure 3-3 Component Name (Control Panel)......................................................................... 25
Figure 4-1 Step-control Parameters and intra-Step Parameters ............................................. 64
Figure 4-2 Step Behavior ........................................................................................................ 65
Figure 4-3 Stop Phase ............................................................................................................ 68
Figure 4-4 Example of Sequence............................................................................................ 69
Figure 4-5 Process Flow in Sequence Step ............................................................................ 70
Figure 4-6 Branch Operation/Stop Operation.......................................................................... 70
Figure 4-7 Sequence Edit View............................................................................................... 92
Figure 4-8 Sequence Control View (Output Off State) ............................................................ 92
Figure 4-9 Sequence Control View (Output On State/Sequence in Execution) ....................... 92
Figure 4-10 Sequence Control View (Output On State/Sequence Stopped) ........................... 93
Figure 4-11 Simulation Function Steps ................................................................................... 95
Figure 4-12 Voltage Dip Simulation Example.......................................................................... 96
Figure 4-13 Voltage Change Simulation Example................................................................... 97
Figure 4-14 Process Flow through Simulation Steps............................................................... 98
Figure 4-15 Stop Operation ....................................................................................................98
Figure 4-16 Simulation Edit View .......................................................................................... 116
Figure 4-17 Simulation Control View (Output Off State, Simulation Stopped) ....................... 116
Figure 4-18 Simulation Control View (Output On State, Simulation Running) ....................... 116
Figure 4-19 Simulation Control View (Output On State, Simulation Stopped) ....................... 117
Figure 4-20 Current Waveform Containing Many Harmonic Components ............................. 117
Figure 4-21 Inrush Current Example ..................................................................................... 119
Figure 4-22 Clipped Sine Wave ............................................................................................ 121
Figure 4-23 USB Memory Folder Structure ........................................................................... 143
Figure 4-24 The Message Window to be Shown Before the Automatic Output-On After the
Power-On ......................................................................................................... 177
Figure 5-1 Component Name (Display Areas on the Screen)................................................ 188
Figure 5-2 Menu Composition............................................................................................... 192
Figure 7-1 Remote Controller External View ......................................................................... 208
Figure 7-2 Correspondence between Front Grills and Air Filters........................................... 209
Figure 9-1 Error Message Screen Example .......................................................................... 216

PROGRAMMABLE AC POWER SOURCE
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Figure 11-1 Range of Ambient Temperature/Humidity .......................................................... 260
Figure 11-2 Outline Dimensional Drawing (DP420LS/DP480LS) .......................................... 262
Figure 11-3 Outline Dimensional Drawing when using fixing bracket for 1 unit ..................... 263
Figure 11-4 Outline Dimensional Drawing when using Jointing Plate for 2 Units................... 264
Figure 11-5 Outline Dimensional Drawing when using Jointing Plate for 3 Units................... 265

DP420LS/DP480LS xiii
List of Tables
Page
Table 2-1 List of Content........................................................................................................... 6
Table 2-2 Heat Value ................................................................................................................ 7
Table 2-3 Mass ......................................................................................................................... 7
Table 2-4 Maximum Input Power/Current................................................................................ 11
Table 3-1 Component Name (Front) ....................................................................................... 22
Table 3-2 Component Name (Rear)........................................................................................ 24
Table 3-3 Component Name (Control Panel) .......................................................................... 25
Table 3-4 How the Rated Power Icon is Displayed Depending on the Power Unit Energization
Setting ................................................................................................................ 28
Table 3-5 Character String Entry List...................................................................................... 33
Table 3-6 Shortcut Operations ................................................................................................ 34
Table 3-7 Description of the AC/DC Mode .............................................................................. 35
Table 3-8 The Description of the Signal Source...................................................................... 35
Table 3-9 List of the Selectable Combinations of the AC/DC Mode and the Signal Source..... 36
Table 3-10 The Setting Range per Output Range................................................................... 38
Table 3-11 Main Measurement Functions ............................................................................... 46
Table 3-12 The Measuring Mode for the Measured Values of the Output Voltage and Output
Current ............................................................................................................... 47
Table 4-1 Wattage Limiter Value per Phase (Reference value)............................................... 63
Table 4-2 Parameters of Sequence Function.......................................................................... 66
Table 4-3 Example of Editing Sequence ................................................................................. 69
Table 4-4 Simulation Function Parameters ............................................................................. 94
Table 4-5 Simulation Function Steps and Settable Step Parameters ...................................... 95
Table 4-6 Voltage Dip Simulation Edit Example...................................................................... 97
Table 4-7 Voltage Change Simulation Edit Example............................................................... 97
Table 4-8 Different Output Voltage Settings Depending on Clip Depth Setting Method ........ 122
Table 4-9 Content Saved in Sequence Memory.................................................................... 141
Table 4-10 Content Saved in Simulation Memory ................................................................. 142
Table 4-11 Setting pattern of external control, Remote sensing and AGC / Autocal ............. 147
Table 4-12 Setting Range of DC Offset Adjustment Value.................................................... 157
Table 4-13 CONTROL I/O Pin Assignment ........................................................................... 167
Table 4-14 Step sync code.................................................................................................... 167
Table 4-15 Memory specification........................................................................................... 167
Table 4-16 The Output Terminal Impedance in the Output Off State when the Activation of the
Output Relay is Disabled .................................................................................. 175
Table 4-17 Setting Items to be Reset.................................................................................... 184
Table 5-1 Component Name (Display Areas on the Screen)................................................. 188
Table 5-2 Status Icons .......................................................................................................... 189
Table 5-3 Measured Value Display Items.............................................................................. 190
Table 5-4 Output Setting Display Items................................................................................. 191

PROGRAMMABLE AC POWER SOURCE
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Table 5-5 Menus of the Continuous Function........................................................................ 192
Table 5-6 Menus of the Sequence Function.......................................................................... 193
Table 5-7 Menus of the Simulation Function ......................................................................... 194
Table 5-8 Menus of the Memory Function............................................................................. 194
Table 5-9 System Menus ...................................................................................................... 195
Table 7-1 System Cable .......................................................................................................208
Table 7-2 Replacement Air Filter Model Names.................................................................... 209
Table 7-3 Fixing Bracket Model Names ................................................................................ 209
Table 9-1 Description of the Error Message Screen.............................................................. 216
Table 9-2 Error Message List................................................................................................ 219
Table 9-3 Actions When a Failure is Suspected.................................................................... 223

DP420LS/DP480LS 1
1. Outline
1.1 Overview ............................................................................ 2
1.2 Features ............................................................................. 2